Math, asked by ravneetkaurkharoud6, 10 months ago

solve for x and y
11x+15y+23=0;7x-2y-20=0

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Answered by amankumaraman11

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11x+15y +23 =0

=>11x+15y =-23

- - - - - - - - (1)

7x-2y-20=0

=>7x-2y=20

- - - - - - - - - (2)

11x+15y=-23. (multiply by (2)

7x-2y=20(multiply by (15)

22x+30y= -46 - - - - - - - - - (3)

105x-30y= 300. - - - - - - - - - (4)

_____________

127x=254

X=254/127

X=2. - - - - - - - - (5)

7x-2y=20

7(2)-2y=20 (x=2)

14-2y=20

-2y=20-14

-2y=6

y=6/-2

Y=-3 - - - - - - - (6)

X=2

Y=-3

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solve for x and y
11x+15y+23=0;7x-2y-20=0